AssaultCube Reloaded Zombie Chain Reactions

Originally added in ACR 2.5.2 and added back in 2.6.3, zombies' bomber and martyrdom grenade explosions damage other zombies. 0:00 Wave 2-15 12:40 Wave 16-19 17:22 Wave 20-25 23:28 Wave 26-29 27:33 Wave 30 (first attempt) 27:43 Recovery 29:37 Wave 30 (final wave)